Photorechargeable Lead-Free Perovskite Lithium-Ion Batteries Using Hexagonal Cs3Bi2I9 Nanosheets,Nano Letters

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Photorechargeable Lead-Free Perovskite Lithium-Ion Batteries Using Hexagonal Cs3Bi2I9 Nanosheets
Nano Letters ( IF 9.6 ) Pub Date : 2021-06-16 , DOI: 10.1021/acs.nanolett.1c01000
Neha Tewari ₁ , Sunil B Shivarudraiah ₁ , Jonathan E Halpert ₁

Affiliation

Materials that enable bifunctional operation in harvesting and storing energy are currently in high demand, due to their potential to efficiently use renewable solar energy. Here, we present a lead-free, all-inorganic, bismuth-based perovskite halide, which acts as a photoelectrode that can harvest energy under illumination without the assistance of an external load in a lithium-ion battery. The battery performance is shown using three different current collectors: copper, fluorine-doped tin oxide (FTO) and carbon felt (CF) to exhibit the electrode’s function as a normal coin cell, as a basic photobattery with a transparent collector to elucidate its functional mechanism, and as an optimized photobattery displaying competitive metrics with other photobatteries obtaining a photo conversion efficiency of ∼0.43% for the first discharge. Upon discharging under illumination, we observed an increase in capacity from 410 to 975 mA·h·g^–1. Further exploration in anode structure and design provides a path toward more efficient photobatteries.

中文翻译：

使用六方 Cs ₃ Bi ₂ I ₉纳米片的可光充电无铅钙钛矿锂离子电池

由于能够有效利用可再生太阳能的潜力，目前对能够在收集和储存能量中实现双功能操作的材料的需求量很大。在这里，我们提出了一种无铅、全无机、铋基钙钛矿卤化物，它充当光电极，可以在锂离子电池中无需外部负载的帮助下，在光照下收集能量。使用三种不同的集电器显示电池性能：铜、掺氟氧化锡 (FTO) 和碳毡 (CF) 以展示电极作为普通纽扣电池的功能，作为具有透明集电器的基本光电池以阐明其功能机制，并作为一种优化的光电池，显示出与其他光电池的竞争指标，第一次放电的光转换效率约为 0.43%。^–1 . 阳极结构和设计的进一步探索为更高效的光电池提供了途径。

更新日期：2021-07-14

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